2565022655 has 16 divisors (see below), whose sum is σ = 3336763584. Its totient is φ = 1881619200.

The previous prime is 2565022613. The next prime is 2565022657. The reversal of 2565022655 is 5562205652.

It is not a de Polignac number, because 2565022655 - 2¹² = 2565018559 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565022657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120854 + ... + 140483.

It is an arithmetic number, because the mean of its divisors is an integer number (208547724).

Almost surely, 2^2565022655 is an apocalyptic number.

2565022655 is a deficient number, since it is larger than the sum of its proper divisors (771740929).

2565022655 is a wasteful number, since it uses less digits than its factorization.

2565022655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261506.

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 2565022655 is about 50646.0527089723. The cubic root of 2565022655 is about 1368.8748207235.

The spelling of 2565022655 in words is "two billion, five hundred sixty-five million, twenty-two thousand, six hundred fifty-five".